Air-whistle



S SMITH AIR WHISTLE.

(No Model.)

Patented Nov.. 5, 1889.

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UNITED STATES PATENT OFFICE.

SINCLAIR SMI'III, OF LONG ISLAND CITY, NElV YORK.

AI R-WHISTLE.

SPECIFICATION forming part of Letters Patent No. 414,336, dated November5, 1889.

Application tiled December 20, 1888. Serial No. 294,168. (No model.)

.T0 all whom it may concern:

Be it known that I, SINCLAIR SMITH, of LongIsland City, county ofQueens, and State of New York, have invented a new and usefulImprovement in Air-IVhistles, of which the following is a specification.

My invention consists in interposing a cylinder fitted with an air-tightpiston between the whistle and a motive force-such as steam, gas, air,or other compressed vapor--whereby the lat-ter serves to operate thepiston and force air contained in thc cylinder through the whistle tosound it, while the vapor may be returned to a suitable receptacle andagain utilized, instead of being discharged into the atmosphere andthereby wasted. In other constructions the motive force passes directlyto and through the whistle. Various disadvantages arise from this methodof applying the motive force, and among them may be mentioned that ofsteam condensing in the branch pipe leading to the whistle, and whichhas to be blown through the same before it can be properly sounded,besides being the cause of much inconvenience7 more particularly whenused in small boats and yachts.

In the drawings, Figure 1 is a side elevation, partly in section, of awhistle and its appurtenances constructed according to my invention.Fig. 2 is na transverse section through the line :c Fig. 1; and Fig 3 isa plan of certain parts.

A designates a whistle, which may be of the usual form and construction.

B is a cylinder tted with a piston C,which normally will rest on thebottom thereof. This cylinder is made sufficiently large to furnish therequisite quantity of air to operate the whistle, to which it isconnected by a pipe D. The piston O is accurately ground to t thecylinder, and is provided with suitable packing-grooves c c c', whichmay be packed, if found necessary.

E E are valves of ordinary construction to regulate the iiow of steam orother vapor motive force to and from the cylinder. These valves arerespectively connected to the main pipe by two pipes e e', which arecoupled to the main pipe by a Y-coupling ci.

F is a supply-pipe connected to the lvalve E, and extends to a source ofmotive force, such as the steam-chamber of a boiler.

F is an exhaust-pipe connected to the valve E', to convey the mot-iveforce after use to a suitable receptacle-such as the condenser of asteam-engine-whereby it may be again utilized.

The valves E l are operated by means of a rock-lever G, mounted on astandard g, secured .to the valve-chests. The extremities of this leverrest loosely on the stems of the valves and are provided with an arm g',to which a wire g2, or other suitable means for rocking the said lever Gby hand, is connected.

I'I is a spring which automatically closes the supply-valve E and opensthe exhaustvalve E.

The operation of my invention is as fol-- lows: On pulling the wire g2the supply-valve E is opened and the exhaust-valve E closed, when themotive force enters the cylinder B, raising the piston and forcing theair contained therein through the whistle and sounding it. On releasingthe wire g2 the spring H closes the valve E and opens the exhaustvalveE', when the weight of the piston will force the contents of thecylinder below it into a condenser or other suitable receptacle, fromwhich they may be again utilized, and simultaneously therewith thecylinder above the piston will again be filled with air.

My invention is peculiarly adapted for application to naphtha boilers orretorts, as it prevents the escape through the whistle of any explosivegas.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-a 1. The combination of the air-whistle A,supply-pipe F, exhaust-pipe F', valves E E', mechanism, substantially asdescribed, for opening one valve and closing the other simultaneously,and the cylinder B, having an air-tight piston C fitted to slide freelytherein, said cylinder being interposed vertically between pipes, theupper one of which communicates with the whistle and the lower one witha coupling c2, uniting pipes c e,which extend from the valves E E',substantially as described.

2. The combination of the air-whistle A and cylinder B, interposedvertically between pipes, the upper one of which communicates IOO withthe Whistle and the lower one With a coupling e2, uniting pipes e e',which eXtend from the Valves E E', interposed, respectively, between thepipes F e and F e', each of said Valves Working in separate chestsprovided?, with inlet and outlet pipes, and each chest Containing aspring tending to Close said valves, the latter being` operated by aroek-4 lever G, fulcrumed between its` ends to a standard g, secured tothe Valveeehests and having its extremities resting loosely on the stemsof said Valves, the said lever also having an arm g', to which a cord g2is attached, by which the supply-Valve E is opened and the exhaust-valveE allowed to close, the latter valve being held normally open and theformer closed by a spring H, substantially as described.

SINCLAIR SMITH. Titnessesr PHILIP J. OREILLY, JAMES S. GREVES.

